Stylus-holder for graphophones and like instruments.



M. H. FISCHER.

STYLUS HOLDER FOR GRAPHOPHONES AND LIKE INSTRUMENTS.

APPLICATION umm MAIL m I911 1,1 20, 1% 1. Patented Dec. 8, 1914.

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APPLICATION FILE!) MAR, 18, I911 Patented D00 8. 1914.

9 EH11 i SHEET 2.

7!? ass as MAXIMILIAN H. FISCHER, OFEAST ORANGE, NEW JERSEY.

STYLUS-HOLDER FOR GRAPHOPHONES AND LIKE INSTRUMENTS.

Application filed March 13, 1911.

To all whom it may concern Be it known that I, MAXIMILIAN H. FISCHER, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Stylus-Holders for Graphophones and like Instruments, of which the following is a specification.

This invention relates to improvements in stylus holders for graphophones and like instruments.

By the use of my invention, the stylus of a graphophone or like instrument will be automatically gripped upon insertion into the holder, and when pressed home during the same operation will be held firmly and rigidly in place and furthermore may be readily, quickly and easily released and removed by a simple manipulation. In this Way, the operation of the instrument is materially facilitated.

One of the greatest objections to the use of hard rubber records is the trouble, annoy ance and time involved in adjusting, removing an'd readjusting the stylus in place after each record has been played. In devices of this kind, it is necessary that the stylus be held firmly and rigidly in osition so as to communicate the full bene t of the vibrations caused by its travel over the indentations in the record to the reproducing diaphragm, and it is furthermore desirable that the stylus may be removed and replaced with great expedition.

By my invention I provide means for automatically gripping the st Ins and means for retaining the same rig-id y in position.

In the accompanying rawin Figure 1 is an elevation of a phonograp Fig. 2 is an enlarged view of the stylus holder and accompanying parts; Fig. 3 is a longitudinal section showing the stylus in lace; Fig. 4 is a similar view of a modified orm of my invention; Fi 5 is a similar View of another modifie form; Figs. 6 to 10, inclusive, illustrate a modified form of device adapted to grip styluses either circular or triangular in cross-section. In said figures, Fig. 6 is an elevation of a stylus holder and accompanyin parts; Fig. 7 is a longitudinal section s owin the same gripping a cylindrical stylus; 8 is a section on the line 8--8 of Fig. 2; ig. 9 is a longitudinal section showing the device with a stylus of Specification of Letters Patent.

Patented Dec. 8,1914.

Serial No. 613,960.

triangular cross-section held in place; and Fig. 10 is a section on the line 1010 of Fig. 9.

Referring now to Figs. 1 to 5 of the accompanying drawings, A designates phonograph box, B the disk, C the sounding funnel and C the horn; D, the reproducing mechanism, comprising the drum E, diaphragm F, having the vibrating lever G, connected thereto at point f. .H designates a bridge device which may be conveniently used in connection with my invention. I designates a cylindrical casing connected to the vibrating lever G through the bridge H. The casing 1 is provided with an interior inclined face i at what I shall term its front end and a tapering or conical hole a" which forms a seat for the rear end of the stylus. The tapering or conical seat t" will engage the rear ends of styluses of diiferent thicknesses or varying diameters. The seat 71 is preferably formed in a separate metallic piece and forced into the cylindrical casing I from the rear thereof. It will be understood that the casing I is made separately from the bridge H and lever G and subsequently secured thereto. A carrier J extends within the casing I and is provided with apertures j in which apertures are seated gripping devices, such as the balls L, which impinge between an inclined portion 2' and the stylus M when the latter is inserted into the bore of the carrier. The carrier J is also preferably provided with an out wardly extending rim or flange j to enable the operator to manipulate the same to remove or replace the stylus. A spring K interposed between the rear end of the casing I and the carrier J, presses the carrier toward the lower or conical end of the casing and retains the gripping devices in normally operative or gripping position.

In Fig. 4, I have illustrated a modified form in all respects similar to Fig. 3, except that instead of the conical seat a", which as aforesaid is adapted to receive styluses of a great many varying diameters, I have illustrated a seat 2' adapted to receive styluses of only two different diameters, that is to say there are' two concentric circular recesses, one within the other and the smaller one being the deeper of the two.

In Fig. 5 I have illustrated another modified form which is in all respects similar to Fig. 3 above described, except that the carrier J is provided with a rearward extension j which extends rearwardly and slides backward and forward within a recessed seat i in the part containing the conical recessed seat for the stylus.

In Figs. 6 to 10, inclusive, l have shown another modified form of stylus holder embodying my invention, adapted to grip and retain styluses of either circular or triangular cross-section. Referring now to said Figs. 6 to 10, A designates the drum, B the diaphragm, C the vibrating lever connected to the diaphragm at the point I) and D designates the usual bridge piece. 1E designates a cylindrical casing preferably provided with an inclined face l at one side thereof. Fixed...within the casing in any suitable manner is what I shall term a socket piece G provided with a groove, or cut out portion 9, triangular in cross-sec tion, extending longitudinally substantially throughout the entire lengthof the piece G". The socket piece G is provided with a rearward extension and connects the entire device to the bridge D. A spring-pressed carrier F carrying a gripping device such as the ball H is movable longitudinally relative to the casing and to the said socket.

piece, and slides upon the edges of the triangular shaped groove or bore g. The carrier F is provided with an outward projection f for the purpose of manipulation, and a spring J abuts between the carrier and a portion of the socket piece G which as aforesaid is fixed in relation to the casing. The spring J of course normally forces the carrier outwardly toward the insertion open- 4 ing and maintains the gripping device in normal gripping position and in engagement with the inclined face of the casing.

The form of my invention illustrated in Figs. 6 to 10 inclusive, is especially effective in retaining styluses rigidly in place so as to procure the full benefit of its vibrations. By this construction the stylus is held rigidly against the Walls of the socket 9 along its entire length.

In Figs. 7 and 8 l have illustrated a cylindrical stylus X. held in place in my said device, and in Figs. 9 and 10 I have shown a stylus X triangular in cross-section so held.

Having described my invention, I claim:

A stylus holder for graphophones and like instruments, comprising a casing provided with an inclined face converging to its front end, a spring-pressed carrier movable longitudinally relatively to said casing and having a longitudinal bore for the insertion of the stylus, gripping devices carried by said carrier and moved transversely of the line of movement of the carrier by engagement with said inclined face to grip the stylus upon insertion into the bore of the carrier, means for preventing the stylus from wabbling and means extending out of the casing for controlling the movement of the carrier to release the stylus.

In witness whereof, I have signed my name to the foregoing specification in the presence of two subscribing witnesses.

MAX. H. FISCHER.

Witnesses:

R. V. F INN, H. V. Honluns. 

